Code No.U0121: CAN Time-out Error (ABS/ASC)
OPERATION
DIAGNOSIS CODE SET CONDITIONS
PROBABLE CAUSES
- Malfunction of the CAN bus
- ABS/ASC-ECU malfunction
- Malfunction of A/T-ECU
DIAGNOSTIC PROCEDURE |
STEP 1. M.U.T.-III CAN bus diagnostics |
| Use M.U.T.-III to perform the CAN bus diagnosis. |
Q.
Is the check result normal?
|
 Go to Step 2. |
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 Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnosis Table  ). |
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STEP 2. M.U.T.-III diagnosis code |
| Check if the ABS/ASC-related diagnosis code is set. |
Q.
Is the ABS/ASC-related diagnosis code set?
|
| Carry out the appropriate troubleshooting. |
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| Go to Step 3. |
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STEP 3. Symptom recheck after erasing diagnosis code |
Q.
Is the check result normal?
|
| Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ). |
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| Replace A/T-ECU. |
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